Pivot joint



June 24, 1930. w, A. CHRQST 766,882

PIVOT JOINT Filed Feb. 21, 1929 a a0 Q75 4 Patented June 24, 1930 UNITEDSTATES PATENT OFFICE WILLIAM A. CHKYST, OF DAYTON, OHIO, ASS

OI DAYTON, OHIO, A COR PIVOT JOINT Application filed February 21, 1929.Serial No. 341,809.

present invention will be apparent from the following description,reference being had to the accompanyingv drawings, wherein a preferredembodiment of one form of the present invention is clearly shown.

In the drawings: Fig. 1 is a somewhat diagrammatic view showing parts ofthe front end of an automobile chassis equipped with a h draulic shockabsorber, and also showing tli connected to the shock absorber the pivotjoint of this invention.

ig. 2 is a side elevation on a larger scale of the pivot joint of thisinvention.

Fig. 3 is a view taken on line 33 of Fig. 2. FFig. 4 is a section takenon line 44 of 1 gimilar reference characters refer to similar partsthroughout the severaldrawi-ngs.

In Fig. 1, 10 designates the front end of the chassis frame side rail,11 the front axle, 12 the leaf spring connecting frame and axle, and 13adouble-acting hydraulic shock absorber unit which is rigid with siderail 10. Unit 13 has a laterally projecting rock shaft 14 having a leverarm 15 fixed thereto. The outer end of lever 15 is connected to theupper end of thrust link 17 by means of the pivot joint 19, and thelower end of link 17 is connected by the joint 18 to the fitting 16which is rigidly fixed to axle 11. Therefore link 17 is undercompression when axle 11 is moving up and thereby causing lever 15 toswing counter-clockwise and conversely is under tension when axle 11 ismoving down. The general arrangement of the parts so far described formsno part-of the present invenlever arm by 20, .the external IGNOR TODELGO PRODUCTS CORPORATION, PORATION OF DELAWARE tion, this inventionrelating to the improved form of joint 19.

. The outer end of arm erably integral therewith, molded soft rubberblocks over eye 20 until they abut line thereof and thus form 15 has aneye 20 prefas shown. Two

21' are inserted along the center an internal bushing 22 and an externalbushing 23 for said eye bushin provided with a The thrust link 17 isillu from two cooperating 30 which, When bolted together g 23, however,being suitable aperture 24 through which lever arm 15 extends.

(See Fig. 3.) as being made metal halves as shown, will strated pressedform a quite rigid link. Each half 30 termlnates at its upper end in awhich fits snugly around the rubber blocks 21, each 0 cup portion 31outside of the up 31 being provided with a cut-out portion or opening 32to provide ample clearance with emerges from the rubber. e thrust link bolt 35 passes through cups 31 and through between the rubber lever 15where it (See Fig. 3.) The central apertures in the interior rubberbushing 22. By tightening nut 36 as desired, it is obvious that the softrubber material may be put under any desired initial com such as to givethe desired non-slipping bond and its contacting metal pression,

parts during relative movement between lever 15 and link 17. two cupsFigs. 31 separated a short distance, thus provlding a small annular 3and 4 show.the

space for the rubber to flow when compressed. When very hlgh compressionis desired the cups 31 may be made to contact when nut 36 is drawn up toits tightest position, the rubber being permitted to bulge outwardlyrecesses 32 surrounding arm 7 The side tween side rail certain amountSuch lateral pivoting only through the 15.

sway or lateral movement be- 10 and axle 11 will im of lateral pose apivoting or unien lever 15 and link can be taken by the joint 19, as canbe readily seen from Fig.

4 by consldering eye 20 held stationary and of l nk 17 moved to theright It is obvious that, there will be no the lower end or left.metal-to-metal contact moved through quite a rubber material of couruntil the link 17 is large angle, the soft se distorting orflowingaround within its confining casing to permit this lateral distortion.The oint 18 at the lower end of link 17 may be a substantial duplicateof the upper joint 19, or 1t may be any other suitable type of ]o1ntwhlch will permit a slight universal movement of link 17 relative tofitting 16. p

The joint of this invention may be used in any case where there is alimited angular movement between the connected parts. The limiting pivotangle in the joint illus- -trated being determined by the lever 15metallic member surrounding said eye member and extending interiorlythereof, an exterior metal casing clamped upon said resilient member andfixed to the second relatively movable part, and a pin extendingtransversely throu b said caslng and eye member but isolated $10111 saideye member by said resilient material.

2'. A pivot joint connecting two relatively movable parts comprising: aneye member fixed on one of said parts, a resilient nonmetallic membersurrounding said eye member, an exterior metal casing surrounding andclamped upon said resilient member and fixed to the second relativelymovable part, and a bolt extending through said casing and eye memberfor clamping said casing upon said resilient member.

3. A pivot joint connecting two relatively movable parts comprising: aneye member fixed on one of said parts, a resilient nonmetallic membersurrounding said eye member and extending interiorly thereof, two metalcupped members clamped upon opposite sides of and encasing saidresilient memv ber and fixed to the second relatively mova ble part, anda pin extending through said eye member and isolated therefrom andsupported by said cupped members.

4. A pivot joint connecting two relatively movable parts comprising: aneye member fixed on one of; said parts, a resilient nonmetallic membersurrounding'said eye member, two metal cupped members clampe uponopposite sides of and encasing said resilient member and fixed to thesecond relatively movable part, and a pin extending through said eyemember and cupped members and holding said cupped members clamped inplace.

5. A pivot joint connecting two relatively movable parts comprising: aneye member fixed on one of said parts, a resilient nonmetallic membersurrounding said eye member, said second movable part comprising twometal bars each terminatin%- in a pressed metal cup, said bars being xedtogether so that said cups are clamped upon opposite sides of saidresilient member, and a transverse pin extending through said eye memberand supported by said cup members.

In testimony whereof I hereto aflix my signature. Y

WILLIAM A. CHRYST.

